Hello,
im want to run a Soft-SPS under RTLinux and have a problem getting it
running on a pc 104 with a 486DX Cyrix cpu (2.2.18kernel rt3.1)
Everything works fine with a Pentium cpu.
But on the 486 board running the attatched realtimethread, a slightly
modified hello.c with a 1ms period, doing nearly nothing but getting
scheduled every millisecond, it is no longer possible to have a (non
realtime) serial communication with the board because a lot of checksum
errors and bytes lost. I cannot imagine this beeing a hardware limit so what
can be the problem here?
What minimum realtimethread period is possible under RTLinux?
Thanks in advance
Dieter Schroeder
My system-killer module:
#include <rtl.h>
#include <time.h>
#include <pthread.h>
pthread_t thread;
unsigned int i;
void * start_routine(void *arg)
{
struct sched_param p;
p . sched_priority = 1;
pthread_setschedparam (pthread_self(), SCHED_FIFO, &p);
pthread_make_periodic_np (pthread_self(), gethrtime(), 1000000);
while (1) {
pthread_wait_np ();
i=i+1;
}
return 0;
}
int init_module(void) {
return pthread_create (&thread, NULL, start_routine, 0);
}
void cleanup_module(void) {
rtl_printf("...bye...done it: %d\n", i);
pthread_delete_np (thread);
}
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